I found this blog post highly engaging, even if it is a bit overly critical for my taste. It lays out the barriers to personalized PD as Control, Compliance, and Permission.
Do you agree? What are the other barriers to Personalized Professional Learning?
http://tomwhitby.wordpress.com/2013/10/20/pd-roadblocks-control-compliance-and-permission///cdn.embedly.com/widgets/platform.js